The vast majority of wav, aiff, mp3, and m4a files work on AudioStretch. One notable format that does not work is wma (Windows Media Audio) which used to be (and maybe still is) used a lot on Windows.
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The vast majority of wav, aiff, mp3, and m4a files work on AudioStretch. One notable format that does not work is wma (Windows Media Audio) which used to be (and maybe still is) used a lot on Windows.